Where to install surge protector(SPD)?

1.power distribution cabinet, switch cabinet, distribution
board(Power Supply SPD)Precision instrument front end connected with UPS, frequency
converter and PLC(Precision instrument SPD)telephone line, fax line,MODEM(Telecommunications and digital
circuits SPD)2,Selection principle of power surge protectorThe purpose of the power SPD contains low voltage power
distribution cabinet and medium voltage distribution cabinets two
series of products.With the rated current of the distribution cabinet as the
reference, select the required SPD level (over current protection
ability), such as 400A power distribution cabinet is to choose 40
kA per phase of the product. Can high, not low.The purpose of the SPD protection level is determined, according to
the degree of precision the client's budget to protect the
equipment, can choose the general configuration, advanced
configuration and top-level configuration SPD.

Note: (1) in addition to RM for the model of the product, the other
products are the 10 die products. (2) in addition to ST-S sine wave
tracking function, other products have.

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